A customer is considering changing the server configuration in there data center to virtual machines and Network-attached storage. Are there any issues we should be aware of regarding SQL Anywhere in this configuration? We are currently moving all databases to 12.0.1 but will have a few still running 9.0.2 when this is scheduled to take place.

@Volker: Not yet. The Google Custom Search Engine feature seems to be broken. I have done some fiddling, but it will probably take some time to see any results. The symptom? Bogus result sets for some searches, like "select" returning only one hit, but "olap" returning several. The Google CSE GUI also seems to be unstable.

The article explains the I/O semantics required by both Linux and Windows with respect to their filesystems. The issue with running under a VM is whether or not the VM relays flush() and similar calls from the host OS through to the underlying hardware. If it does not, then potential exists for corruption, particularly with power failures.